the Footsie
noun
FINANCE uk/ˈfʊtsi/ usinformal for the FTSE 100 (Index): a number which shows the value of the share prices of the 100 most important British companies, published by the Financial Times (= a British business newspaper):
The Footsie closed 24.4 points higher at 4116.
the Footsie index
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FTSE 100
FTSE 250